Freezing cold here right now at -25 c, going down to -34 c tonight!! Pond is froze over pretty good, except for several open breather holes in each pond, thanks to the big 1500 watt Cattle trough heater. The water is still flowing nicely between the three connecting ponds and I can hear it "gurgling" under the ice caps in the spillways. I had been using the 1250 watt green pond heater but switched to the big 1500 watt early this morning cause the pond breather holes were too small for my liking...
So I brought out the big 1500 watt heater at 5am this fridget morning, and placed it on the ice, and it made a Evil HiSS as it steamed a hole quickly open in the thick ice.